As of the end of the fourth quarter 2010, the OPA had 18,137 megawatts (MW) of electricity supply capacity, based on average contract capacity, under contract. This includes 7,202 MW of renewable energy, 7,935 MW of clean energy, and 3,000 MW of nuclear energy.
Within this 18,137 MW of supply capacity, 4,709 MW were procured from existing generating facilities including the 2,140-MW Lennox Generating Station (GS), which required no or minimal new capital investment. The remaining capacity, 13,428 MW, was procured from new development, expansion, redevelopment or refurbishment of existing facilities.
This represents more than $27 billion of new capital investment in generation in the Ontario electricity system since 2005.